linux-kernel - Re: [PATCH v2] include/linux/vfio.h: Guard powerpc-specific functions with CONFIG_VFIO_SPAPR

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Message-ID: <c570cffb-f713-22d9-ebf7-46d752d562be@gmail.com>
Date:   Tue, 25 Jul 2017 10:56:38 -0300
From:   Murilo Opsfelder Araújo <mopsfelder@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     kvm@...r.kernel.org, Alex Williamson <alex.williamson@...hat.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v2] include/linux/vfio.h: Guard powerpc-specific functions
 with CONFIG_VFIO_SPAPR_EEH

On 07/18/2017 02:22 PM, Murilo Opsfelder Araujo wrote:
> When CONFIG_EEH=y and CONFIG_VFIO_SPAPR_EEH=n, build fails with the
> following:
> 
>     drivers/vfio/pci/vfio_pci.o: In function `.vfio_pci_release':
>     vfio_pci.c:(.text+0xa98): undefined reference to `.vfio_spapr_pci_eeh_release'
>     drivers/vfio/pci/vfio_pci.o: In function `.vfio_pci_open':
>     vfio_pci.c:(.text+0x1420): undefined reference to `.vfio_spapr_pci_eeh_open'
> 
> In this case, vfio_pci.c should use the empty definitions of
> vfio_spapr_pci_eeh_open and vfio_spapr_pci_eeh_release functions.
> 
> This patch fixes it by guarding these function definitions with
> CONFIG_VFIO_SPAPR_EEH, the symbol that controls whether vfio_spapr_eeh.c is
> built, which is where the non-empty versions of these functions are. We need to
> make use of IS_ENABLED() macro because CONFIG_VFIO_SPAPR_EEH is a tristate
> option.
> 
> This issue was found during a randconfig build. Logs are here:
> 
>     http://kisskb.ellerman.id.au/kisskb/buildresult/12982362/
> 
> Signed-off-by: Murilo Opsfelder Araujo <mopsfelder@...il.com>
> ---
> 
> Changes from v1:
> - Rebased on top of next-20170718.

Hi, Alex.

Are you applying this?

Thanks!

-- 
Murilo